Question: What hypothesis starts with the letter "s"?
Paraphrase: What speculation begins with the letter "s"?
SPARQL (Wikidata): SELECT DISTINCT ?sbj ?sbj_label WHERE { ?sbj wdt:P31 wd:Q41719 . ?sbj rdfs:label ?sbj_label . FILTER(STRSTARTS(lcase(?sbj_label), 's')) . FILTER (lang(?sbj_label) = 'en') } LIMIT 25 
Answer: STRO-1, STRO-1, Savannah hypothesis, Savannah hypothesis, Sourozh, Sourozh, Surozh, Surozh, SARS-CoV-2 source tracing, SARS-CoV-2 source tracing, Stirrup Thesis, Stirrup Thesis, simulation hypothesis, simulation hypothesis, Sahara pump theory, Sahara pump theory, sleeper effect, sleeper effect, small world experiment, small world experiment, singular cardinals hypothesis, singular cardinals hypothesis, Seed AI, Seed AI, strategy of tension in Italy, strategy of tension in Italy, somatic marker hypothesis, somatic marker hypothesis, Shiva Hypothesis, Shiva Hypothesis, Sequence hypothesis, Sequence hypothesis, Spearman's hypothesis, Spearman's hypothesis, Stereotype fit hypothesis, Stereotype fit hypothesis, S-phase-promoting factor, S-phase-promoting factor, semilingualism, semilingualism, Slab gap hypothesis, Slab gap hypothesis, Swoon hypothesis, Swoon hypothesis, Synaptotropic hypothesis, Synaptotropic hypothesis, supplementary hypothesis, supplementary hypothesis, Sexy son hypothesis, Sexy son hypothesis